/Engine/Plugins/VirtualProduction/Takes/Source/TakesCore/Public/TakeRecorderSource.h
If you are not recording into a sub-sequence then this will be called after PreRecording is called and will specify the folder that this Source should add itself to. This will not be called if you are recording into a sub-sequence as recorded data should be placed in the root of the sub-sequence in that case.
virtual void AddContentsToFolder ( class [UMovieSceneFolder](API\Runtime\MovieScene\UMovieSceneFolder) * InFolder )